Sailorchic has most of it. The A30 started life as an air cooled diesel
. To marinize it, Briggs and Stratton put a fiberglass
jug, sometimes aluminum
, around the finned cylinder sealing it to block and head
with O-rings. A Johnson pump runs seawater through the cavity.
The o-ring seals
almost always leak, usually right onto to the starting motor
solenoid. Our Cal
was an insurance
recovery when the previous owner left without turning off the fuel
feed. The leaking seawater shorted the poles very similar to sailchics screwdriver. The starter engaged, the engine
idled, with starter engaged for weeks. Finally, with raw water
seacock closed, the exhaust
hose finally melted and suffocated the engine
. The starter was destroyed along with the ring gear
. After rebuild
, we have had it for fourteen years without a repeat. Even after the "factory rebuild" the O-rings leak. After each use, I fog
the engine, especially the solenoid with WD40.
My guess is you have a little corrosion
in the solenoid cylinder that binds the action until it cools.
Your access is probably similar to the Cals, poor. I think you can get to the solenoid, remove the two casing screws and open it enough to get some WD into the case.
They are great engines, even if the admiral doesn't like the noise
and vibration of single
John -Former Farymann